Means for propelling boats.



-PATNNTED DEG. 24, 1907. L. A.. HARTMANN. MEANS PoR PNOPNLLING BOATS.

APPLICATION FILED AUG. IQ, 190B.

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LOUIS A. HARTMANN, OF BROOKLYN, NEW YORK.

MEANS .FOR PROPELLING BOATS.

Specification of Letters Patent.

Patented Dec. 24, 1907'.

Application filed August IO. 1906. Serial No. 330,006.

To all whom it may concern:

Be it known that I, Louis A. HARTMANN, a citizen of the United States,and resident of Brooklyn, in the county of Kings and State d of NewYork, have invented certain new and useful Improvements in Means forPropellingBoats, of which the following is a specification.

My invention relates to improvements in means for propelling boats.

On account of the lack of opportunity or adaptability many persons areunable to properly row a boat, with the result, in some instances, thatmuch energy is wasted, and in others that the boat is caused to capsize,thus rendering this form of enjoyment undesirable and dangerous.

My invention therefore has for its object to provide simple, inexpensiveand effective means for manually operating a screw propeller and forcontrolling the rotations thereof, whereby small boats, such forinstance as row boats, can be as easily propelled, the speed controlledand the same rate of speed attained, by an equal degree of energyexerted, by a novice as by an expert.

In the drawings: Figure 1 is a onglitudinal sectional view of a boatinstalled with my propelling means. Fig. 2 a transverse verticalsectional view thereof.

In both figures of the drawings illustrating `my invention likereference characters designate corresponding parts.

Referring to the drawings, 1 designates a small boat, preferably of thesize and style known as a row boat and having a rudder 2.

Within the boat, at approximately a central point between its bow andstern, is secured a base 3 upon which is mounted a casing 4 in which arerotatably j ournaled short shafts 5, 6, 7, 8 and 9 having a graduatedtrain of gears secured thereon, the lower gearof which is a worm gear.The ends of the shafts 5 and 6 project beyond the casing and are squaredto adapt them to receive and be turned by a crank, whereby if the shaft5 be turned, what I term as, high speed will be attained and if theshaft 6 be turned, what I term as, low speed will be attained. One endof the shaft 8 has a fly wheel 10 secured thereon and a brake lever 1 1is pivoted on the casing and adapted to be forced into engagement withsaid wheel, against the action of a spring 12, to slow down or stop thetrain of gears and thereby slow down the speed of the boat or stop itentirely. On the inner end of the shaft 13 of the propeller 14 issecured a worm 15 which meshes with the lower gear of the gear train,thereby transmitting power therefrom to the propeller shaft. By thisarrangement it will be seen that a person can sit or stand facing thebow of the boat while operating the driving and braking mechanisms.

The operation of controlling and propelling the boat is as follows: Ifhigh speed is desired the crank is placed on the squared ends of theshaft 5 and turned thus starting the train of gears and through themedium of the connection of the lower worm gear with the worm on thepropeller shaft the propeller is driven and if it is desired to slowdown or stop the boat the foot is pressed down on the brake leverforcing its shoe into engagement with the iiy wheel. If low speed isdesired the crank is removed from the end of the upper shaft and placedon one end of the shaft 6, thus cutting out the upper gear 5 of thetrain and reducing the speed.

I do not wish to be understood as limiting myself to' the precisedetails and arrangements of parts shown and described, but reserve theright to all modifications within the scope of my invention.

Having now described my invention what I claim as new and desire tosecure by Letters Patent, is

1. In a boat, a propelling shaft provided on one end with ascrew-propeller and on the other end with a worm gear, a base, a framemounted on said base, short shafts ournaled in said frame, and the endsof a plurality of said shafts projecting through said frame and beingsquared to receive a crank, a train of graduated speed changing gearssecured on said shafts, the lower gear of said train meshing with thegear on the propeller shaft, a fly wheel secured on one of said shaftsand a foot operated brake-lever adapted to be forced upwardly to engagesaid ffy-wheel to stop the movement of said gears and be automaticallydrawn downwardly out of engagement with the fly-wheel, substantially asdescribed.

2. In a boat, a propelling shaft provided on one end with a screwpropeller and'on the other 'end with a worm gear, a base, a framemounted on said base, short shafts journaled in said frame and the endsof the plurality of said shafts projecting through said frame and beingsquared to receive a crank, a train of graduated speed changing gearssecured drawing said shoe out of engagement with 10 on said shafts thelower gear of said train said flyewheel substantially as described.meshing vth the gear on the propeller shaft', Signed at New York city,in the county of a Vily wheel secured on one of said shafts and NewYork, and State of New York, this seva foot operated pivoted brake leverlocated enth day of August A. D. 1906.

beneath the ly wheel and having a shoe on LOUIS A. HARTMANN. one endadapted to be forced upwardly to en- Witnesses: gage said fly wheel tostop the movement of A. R. APPLEMAN,

the gears, and a spring for automatically! y M. IyMOsER.

